In X-ray fluorescence a source of X-rays is used to excite the atoms of an analyte in a sample. These excited-state atoms return to their ground state by emitting X-rays, the process we know as fluore...In X-ray fluorescence a source of X-rays is used to excite the atoms of an analyte in a sample. These excited-state atoms return to their ground state by emitting X-rays, the process we know as fluorescence. The wavelengths of these emission lines are characteristic of the elements that make up the sample; thus, atomic X-ray fluorescence is a useful method for both a qualitative analysis and a quantitative analysis.
In describing the optical benches for atomic absorption spectroscopy, we noted the need to modulate the radiation from the source in order to discriminate against emission of radiation from the flame....In describing the optical benches for atomic absorption spectroscopy, we noted the need to modulate the radiation from the source in order to discriminate against emission of radiation from the flame. In this section we consider additional sources of interference and discuss ways to compensate for them.
